The utility model discloses a plug based on universal football shirt is put, the safe -grounding detection plug comprises a plug body, it puts to be provided with an universal football shirt in the plug body, universal football shirt is put including a spheroid and the circular baffle be connected with the spheroid, the cross slide has been seted up on the circular baffle, be provided with the gleitbretter in cross slide horizontal and the vertical slide respectively, fixed being provided with is participated in on the gleitbretter, slide in the cross slide together with participating in through the gleitbretter, change two relative position that participate in, the cross slide, gleitbretter and participating in to electrically conductive material, circular baffle, universal ball and plug body are non - electrically conductive material. The utility model discloses can work as ordinary plug and use, utilize the angle change effect of universal ball and cross slide, make to participate in to become suitable angle with the socket, make and participate in insert the plug, and do not receive the restriction of the space volume shape of plug own.